Spatial regulation of thermomorphogenesis by HY5 and PIF4 in Arabidopsis.

Spatial regulation of thermomorphogenesis by HY5 and PIF4 in Arabidopsis.
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DOI:
10.1038/s41467-021-24018-7
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发表时间:
2021-06-16
影响因子:
16.6
通讯作者:
Huq E
Huq E
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Lee S;Wang W;Huq E

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植物对高环境温度的反应是通过一系列形态变化,统称为热形态发生。在这里,我们表明地上和地下组织对高温的响应是由不同的转录因子介导的。虽然中心枢纽转录因子,光敏色素阻断因子4 (PIF4)调节地上组织的反应,但地下根系伸长主要由伸长下胚轴5 (HY5)调节。植物对高温的反应主要是通过组织特异性的方式表达不同的基因。HY5通过直接控制生长素和BR通路基因等多种基因的表达促进根热形态形成。引人注目的是,地面上和地下的热形态形成在空间上受到损害。由于SPA1直接磷酸化PIF4和HY5, SPAs可能控制PIF4和HY5的稳定性,从而调节两种组织的热形态发生。这些数据表明,植物利用SPA-PIF4-HY5模块的不同组合来调节组织特异性的热形态发生。当暴露在高温下时,植物会发生统称为热形态发生的形态变化。作者发现SPA1激酶通过与PIF4和HY5在茎和根中的相互作用,调节不同组织类型的热形态形成反应。
Plants respond to high ambient temperature by implementing a suite of morphological changes collectively termed thermomorphogenesis. Here we show that the above and below ground tissue-response to high ambient temperature are mediated by distinct transcription factors. While the central hub transcription factor, PHYTOCHROME INTERCTING FACTOR 4 (PIF4) regulates the above ground tissue response, the below ground root elongation is primarily regulated by ELONGATED HYPOCOTYL 5 (HY5). Plants respond to high temperature by largely expressing distinct sets of genes in a tissue-specific manner. HY5 promotes root thermomorphogenesis via directly controlling the expression of many genes including the auxin and BR pathway genes. Strikingly, the above and below ground thermomorphogenesis is impaired in spaQ. Because SPA1 directly phosphorylates PIF4 and HY5, SPAs might control the stability of PIF4 and HY5 to regulate thermomorphogenesis in both tissues. These data collectively suggest that plants employ distinct combination of SPA-PIF4-HY5 module to regulate tissue-specific thermomorphogenesis. Plants undergo morphological changes collectively termed thermomorphogenesis when exposed to elevated temperature. Here the authors show that the SPA1 kinase regulates distinct thermomorphogenic responses according to tissue type by interactions with PIF4 and HY5 in shoots and roots, respectively.
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